Question

which word best completes the following sentence:
antoine laurent lavoisier first demonstrated that ______ is
conserved in chemical reactions.
a volume
b mass
c temperature

Explanation:

Antoine Laurent Lavoisier is known for demonstrating the law of conservation of mass, which states that mass is conserved in chemical reactions (the total mass of reactants equals the total mass of products). Volume and temperature are not what he demonstrated to be conserved in chemical reactions in this context.

Answer:

b. mass